Barium is a chemical element with symbol ba and atomic number 56. It is the fifth element in group 2, a soft silvery metallic alkaline earth metal. Because of its high chemical reactivity barium is never found in nature as a free element. Its hydroxide was known in pre-modern history as baryta; this substance does not occur as a mineral, but can be prepared by heating barium carbonate.
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2

Keep it moving:
And of those issues, only constipation would seem to be of concern. Barium itself can be constipating; it even can solidify stool. Yeah. So be consistent with the treatment you've been prescribed - (don't overdo, tho) preferably fiber, psyllium, PEG (miralax) etc. rather than stimulant laxatives. Keep it moving till the barium's outta there.
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4

No:
There does not appear to be any reason for people with sulfa or sulfite allergies to avoid medications that contain a sulfate salt such as barium sulfate. Here is the web page:
http://allergies.About.Com/od/medicationallergies/a/sulfahub.Htm.
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6

Possibly:
Barium is notorious for being the worst part of the endoscopy and colonoscopy procedures. Symptoms as you describe are frequent. While it is less common to persist as long as you have, it is still likely. Of course, depending on what was done the symptoms could reflect a problem with a biopsy for example or an underlying, separate problem. If it gets worse or you get a fever, present to your doc.
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